Shock-damping buffer



July 21, 1953 E. A. SAHLI 2,646,083

SHOCK-DAMPING BUFFER Filed May 5, 1950 ment of the legs;

Fatented July 21, 1953 I snoc mAMPING BUFFER Ernst Arthur Sahli, Zurich, Switzerland, assignor toBearn S.-A., Tangier, Morocco, a firm Application May 5,1950, Serial No. 160,200 In'Switzerland June 16, 1949 4 Claims.

The present invention relates to a shockdamping buffer, in particular for the cushioning of the picker on looms, consisting of two or more layers of material glued to each other, with at least two springing legs directed transverseto the direction of the blow and. arranged at a distance ,apartfr'om each other, andconnected togethjer by a member attached to the legs."

Known shock-damping buffers of this type have always a semi circular shape at the position connecting the legs. This shape has the drawback that after acertain time the buffer becomes buckled and the two legs are pressed together, so that there is no longer any flexible spring action because of lack of spring move- The shock-damping bufier according to the invention differs from this known construction ning parallel to each other in this bridge.

Fig. 8 an end view of the same section.

The shock-dampingbufier P illustrated in Figs. 1 and 2 is formed by three layers of leather 9, 2 and 3, suitably bent on each other, U-shaped and glued to eachother. In contrast to the known forms of embodiment, between the two legs I) the buffer body has a straight bridge a at right angles to the legs and running in the direction of pressure, all layers of leather run The legs b of the buffer are each provided with a uide hole 4. 1 e As shown in Fig. the buffer with its guiding holes 4 is carried on the picker rod 5, on which with a partial the picker 6 is guided. When the shuttle l,

in that the member connecting the two legs with each other is formed by a bridge running to a great extent. at least approximately parallel to the direction of the blow, in which bridge all the layers of material run parallel to each other.

The advantage of this embodiment of the buffer consists in that, through fitting a straight part running in the pressure direction of the buffer, complete pressing together of the buffer legs is rendered more difficult and will occur only at a much later period of time than would be the case with the circularly shaped bridge in the known buffers. The straight bridge of the buffer oiiers to the load acting in its longitudinal direction a resistance which is indeed flexible, but is considerably stiffened in comparison to the bent bridge, and thereby ensures good andlasting springingof the buifer.

After the spring'force of the buffer legs has been lost, the spring force of the straight bridge will still remain effective for some length of time.

In the drawing some forms of embodiment of the object of the invention are illustrated by way of example, where:

Fig. 1 shows a first form of the shock damping buffer in view;

I Fig. 2 an example of applying the buffer according to the invention for cushioning the picker on looms,

Fig. 3 a side view of a second form of the shock-damping bui fer,

Fig. 4 a cross-section on the line II in Fig. 3,

Fig. 5 a side view of a third form of the shockdamping buffer, g i

Fig. 6 a cross-section on the line IL-II in Fig. 5,

Fig. 7 a side view of a fourth form of the shockdamping buffer and picked from the opposite side, knocks'against the picker, the latter knocks against the bufier P which is supported on the rod 5 and stops the picker. In this way the Whole energy of the impacting shuttle is converted into a damped noise which causes little nuisance.

The second form of embodiment according to Figs. 3 and 4 shows a buffer with three legs, where each of the two successive bridges a and a are connected to the opposite ends of one and the same leg b, thus giving the buffer body a wave-shaped form.

.The straight bridges a, a lie parallel to the picker guide rod 5 coinciding with the axis of the blow, the rod 5 running through in the middle between the bridges. Here the spring path of the buffer is twice as great as in the first form. In contrast to the form in Fig. 1, in the form of execution according to Figs. 3 and 4 the bufier consists of five leather layers glued to each other, the second and fourth layerconsisting of raw hide, i. e. of leather tanned with vegetable mat,

ter, whilst the first, third and fifth layers consist of leather tanned with mineral matter. Instead of, however, all layers could consist of raw hide. I

Figs. 5 and 6 show a form of a Wave-shaped buffer body with five legs, with the connecting axis running through between the bridges. This bufier body is built up of three similar or difierent layers of leather and is distinguished by particular softness and a big spring path. In this case the middle layer can again be formed by a raw hide layer. All layers, however, might also consist of raw hide.

Figs. 7 and 8 show a form in which a sixlegged wave-shaped bufier body is arranged on each of the two sides of the axis taking the blow or the picker guiding rod 5, the outer legs being connected to each other or constituting with each other one piece.

Also this bufier member consists of three layers of leather glued together, of which one, several or all may consist of raw hide. It is distinguished by having great spring force and a big spring path.

Instead of leather layers, it is also possible to adopt layers made of rubber or of impregnated fabric.

Instead of connecting all layers to each other, it is also possible to glue together only some of them and to have the other layers looselyfitted. Thus, for instance, with four, six or more layers. these may be glued together in pairs.

What I claim is:

1. A shock-damping bufier comprising at least two layers of material glued together including at least two springy legs arranged transversely to the direction of shock. and positioned in spaced relation to each other, a member continuous with the legs for connecting the same together, the member connecting the two legs to each other constituting a bridge arranged normally completely parallel to the direction of the shock, and all of said layers of material in the bridge being arranged parallel with each other. 7

2. A shock-damping buffer as claimed in claim 1, wherein at least one layer consists of rawhide.

3'. A shock-damping buffer as claimed in claimv 1, characterized in that it has more. than two legs, each two successive bridges being connected at right angles to opposite ends of one and the same leg so that the successive bridges and legs form a member of wave-like form.

4. A shock-damping buffer comprising a plurality of layers of material glued together including space dparallel springy legs arranged transversely with respect to the direction of shock and on opposite sides of the shock axis and positioned in spaced parallel relation with respect to each other and at right angles to the axis of shock, members continuousv with the legs for connecting the intermediate legs on each side of the axis together, said members constituting bridges arranged normally completely parallel to the'direction of the shock, the end legs connecting the outer ends of the outer bridges on opposite sides of the shock axis together and being penetrated by the shock axis, and all of the layers ofthe material in the bridges and in the legs being respectively arranged parallel with each other. E. ARTHUR SAHLI.

References Cited in the file of this patent UNITED STATES PATENTS 

